I have already tried synchronous iSCSI Volume Replication with failover over LAN according to How-to-resource procedure from Open-E.
This solution implies 2x storage HWs and 2x Open-E DSS V6.

I was wondering is it possible to do this within one system, lets say, with 2x RAID controllers?
I didn't find this scenario in How-to-Resources.
Open-E has a procedure for asynchronous replication/backup of NAS volume within the system.

If it is possible to setup iSCSI volumes replications within the system, does anyone knows the procedure for doing this?

Thanks...